Subject:
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RE: Spybotics demo followup questions
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 24 Jul 2002 09:51:20 GMT
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Original-From:
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Marco Correia <marco@soporcel.^avoidspam^pt>
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Reply-To:
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<marco@soporcel#Spamless#.pt>
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Viewed:
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827 times
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This is a mix of a forward/pseudo-X-post and my comments to the Jake msg on
lugnet.lego.direct:
> -----Original Message-----> Of Jake McKee
> Sent: Tuesday, July 23, 2002 7:33 PM
> To: lugnet.lego.direct@lugnet.com
>
> All,
>
> Several questions came up during the Spybotics demo at
> BrickFest that Jeff
> was unable to answer on the spot. He has since passed those
> questions and
> corresponding answers on to me:
>
>
> *** How much memory is in the brick? (compared to RCX) ***
>
> Two thirds the memory (4k compared to 6k for program download
> "with our
> standard firmware"). And it's persistent: because it's stored
> in EEPROM, you
> can remove the batteries and come back years later to find
> your program is
> still there in good shape.
>
> *** What speed are the motors ***
>
> They run off 3 AA batteries so they are 4.5v based, but they cannot be
> compared that easily.
>
> Because of a better control scheme in the electronics the speed of the
> Spybot motor are very similar to an RCX gear motor (which
> runs off 9v).
>
> Furthermore, because of the more advanced, speed can be
> controlled much more
> precisely. In the RCX gear motors, only torque is
> controllable, thus a motor
> with no load will run at the same speed regardless of the
> setting. Not so
> here, we have speed down to a fine art!
>
> *** What communication protocol does the IR transmission use?
> “LLM”? Is it
> the same as the VLL or Virtual Light Link? ***
>
> No, they use a 'standard' IR communication scheme. Very much
> like the RCX's
> but double the speed and half the message size, so four times
> as efficient.
>
> It is possible, though, to send and receive VLL messages
> through the light
> sensor and the red LED at the back of the robot. For that to work, the
> Spybot needs to be disconnected from the PC-cable.
So there's an IR on the SB unit, after all :) GREAT!
I wasn't understanding how the Remote/Beacon would control the unit through
visible light.
I only hope that RCX <-IR-> Spybotics comms is possible.
That would be great.
> *** Does the SB brick have the same firmware as an RCX? ***
>
> No, but the user downloaded programs that it runs are very similar in
> nature to the RCX. (Both are LASM-based - our own byte code
> format - but the
> Spybot has more commands and some are more sophisticated than the RCX)
>
>
> Hopefully this clears things up. I for one can't wait to get
> my hands on one
> of these sets now!
>
> Jake
>
> ---
> Jake McKee
> Sr. Producer
> LEGO Direct
I'm under the impression the Spybotics are better than I first expected.
I like this feeling :)
mc.
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Message is in Reply To:
 | | Spybotics demo followup questions
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| All, Several questions came up during the Spybotics demo at BrickFest that Jeff was unable to answer on the spot. He has since passed those questions and corresponding answers on to me: *** How much memory is in the brick? (compared to RCX) *** Two (...) (22 years ago, 23-Jul-02, to lugnet.lego.direct)
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